[PATCH v2 3/9] scsi: Pass a request queue pointer to __scsi_execute()

[Bart Van Assche <bvanassche@acm.org>]

This patch does not change any functionality but makes a later patch easier
to read.

Cc: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Alan Stern <stern@rowland.harvard.edu>
Cc: Can Guo <cang@codeaurora.org>
Cc: Stanley Chu <stanley.chu@mediatek.com>
Cc: Ming Lei <ming.lei@redhat.com>
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
---
 drivers/scsi/scsi_lib.c    | 12 +++++-------
 include/scsi/scsi_device.h |  8 ++++----
 2 files changed, 9 insertions(+), 11 deletions(-)

diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 855e48c7514f..e4f9ed355be6 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -221,7 +221,7 @@ void scsi_queue_insert(struct scsi_cmnd *cmd, int reason)
 
 /**
  * __scsi_execute - insert request and wait for the result
- * @sdev:	scsi device
+ * @q:		queue to insert the request into
  * @cmd:	scsi command
  * @data_direction: data direction
  * @buffer:	data buffer
@@ -237,7 +237,7 @@ void scsi_queue_insert(struct scsi_cmnd *cmd, int reason)
  * Returns the scsi_cmnd result field if a command was executed, or a negative
  * Linux error code if we didn't get that far.
  */
-int __scsi_execute(struct scsi_device *sdev, const unsigned char *cmd,
+int __scsi_execute(struct request_queue *q, const unsigned char *cmd,
 		 int data_direction, void *buffer, unsigned bufflen,
 		 unsigned char *sense, struct scsi_sense_hdr *sshdr,
 		 int timeout, int retries, u64 flags, req_flags_t rq_flags,
@@ -247,15 +247,13 @@ int __scsi_execute(struct scsi_device *sdev, const unsigned char *cmd,
 	struct scsi_request *rq;
 	int ret = DRIVER_ERROR << 24;
 
-	req = blk_get_request(sdev->request_queue,
-			data_direction == DMA_TO_DEVICE ?
+	req = blk_get_request(q, data_direction == DMA_TO_DEVICE ?
 			REQ_OP_SCSI_OUT : REQ_OP_SCSI_IN, BLK_MQ_REQ_PREEMPT);
 	if (IS_ERR(req))
 		return ret;
 	rq = scsi_req(req);
 
-	if (bufflen &&	blk_rq_map_kern(sdev->request_queue, req,
-					buffer, bufflen, GFP_NOIO))
+	if (bufflen && blk_rq_map_kern(q, req, buffer, bufflen, GFP_NOIO))
 		goto out;
 
 	rq->cmd_len = COMMAND_SIZE(cmd[0]);
@@ -268,7 +266,7 @@ int __scsi_execute(struct scsi_device *sdev, const unsigned char *cmd,
 	/*
 	 * head injection *required* here otherwise quiesce won't work
 	 */
-	blk_execute_rq(req->q, NULL, req, 1);
+	blk_execute_rq(q, NULL, req, 1);
 
 	/*
 	 * Some devices (USB mass-storage in particular) may transfer
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
index 1a5c9a3df6d6..f47fdf9cf788 100644
--- a/include/scsi/scsi_device.h
+++ b/include/scsi/scsi_device.h
@@ -438,7 +438,7 @@ extern const char *scsi_device_state_name(enum scsi_device_state);
 extern int scsi_is_sdev_device(const struct device *);
 extern int scsi_is_target_device(const struct device *);
 extern void scsi_sanitize_inquiry_string(unsigned char *s, int len);
-extern int __scsi_execute(struct scsi_device *sdev, const unsigned char *cmd,
+extern int __scsi_execute(struct request_queue *q, const unsigned char *cmd,
 			int data_direction, void *buffer, unsigned bufflen,
 			unsigned char *sense, struct scsi_sense_hdr *sshdr,
 			int timeout, int retries, u64 flags,
@@ -449,9 +449,9 @@ extern int __scsi_execute(struct scsi_device *sdev, const unsigned char *cmd,
 ({									\
 	BUILD_BUG_ON((sense) != NULL &&					\
 		     sizeof(sense) != SCSI_SENSE_BUFFERSIZE);		\
-	__scsi_execute(sdev, cmd, data_direction, buffer, bufflen,	\
-		       sense, sshdr, timeout, retries, flags, rq_flags,	\
-		       resid);						\
+	__scsi_execute(sdev->request_queue, cmd, data_direction,	\
+		       buffer, bufflen, sense, sshdr, timeout, retries,	\
+		       flags, rq_flags, resid);				\
 })
 static inline int scsi_execute_req(struct scsi_device *sdev,
 	const unsigned char *cmd, int data_direction, void *buffer,